Getting the Volume of a Room in Cubic Meters

Divide the room into manageable shapes such as triangles, rectangles and circles. For example, if you have a room that looks like a home plate in baseball, you can easily divide the room into a triangle and a rectangle.

Measure the dimensions of each shape in meters. In this example, measure the length and width of the rectangle and the distance from the base and top of the triangle (usually called the height, but not to be confused with the height of the room from floor to ceiling).

Calculate the area of each shape with the appropriate area formula. For rectangles, multiply the length by the width. For triangles, multiple the base times the height times 0.5. For circles, multiply 3.14 by the radius squared. In this example, if the rectangular portion measures 3 meters by 4 meters, and the triangle has a base of 4 and a height of 2 meters, then the rectangular area equals 12 square meters, and the triangular area equals 4 square meters.

Add the area of each section of the room. In this example, add 12 square meters to 4 square meters to get 16 square meters.

Multiply the area of the floor space in square meters by the height of the ceiling to find the volume of the room in cubic meters. Finishing this example: If the ceiling is 3.5 meters high, multiply 16 by 3.5 to find that the volume equals 56 cubic meters.